Method and a device for detecting oscillation and signal coupling device

1. A method for detecting oscillation in a signal coupling device, the method comprising the following steps:

carrying out at least one oscillation detection step including:

determining an undamped signal level of a signal on a signal path of the signal coupling device in a first step;

reducing a gain of the signal path in a second step;

determining a damped signal level of the signal on the signal path and a deviation between the undamped signal level and the damped signal level at least once in a third step;

starting the oscillation detection upon an occurrence of at least one of:

a signal level of a signal on a signal path of the signal coupling device being higher than a predetermined starting threshold value, or

a time derivative of the signal level being higher than a predetermined signal edge threshold; and

detecting an oscillation if at least one deviation determined in the third step of the at least one oscillation detection step is higher than or equal to a predetermined oscillation threshold value.

2. The method according to claim 1 , which further comprises repeatedly determining the damped signal level and the deviation, and detecting an oscillation if all deviations determined in the third step of the at least one oscillation detection step are higher than or equal to the predetermined oscillation threshold value.

3. The method according to claim 1 , which further comprises repeatedly performing the oscillation detection step, and detecting an oscillation if at least one or all deviations determined in the third step of each of the oscillation detection steps is or are higher than the predetermined oscillation threshold value.

4. The method according to claim 2 , which further comprises repeatedly performing the oscillation detection step, and detecting an oscillation if at least one or all deviations determined in the third step of each of the oscillation detection steps is or are higher than the predetermined oscillation threshold value.

5. A method for detecting oscillation in a signal coupling device, the method comprising the following steps:

carrying out at least one oscillation detection step including:

determining an undamped signal level of a signal on a signal path of the signal coupling device in a first step;

reducing a gain of the signal path in a second step;

determining a damped signal level of the signal on the signal path and a deviation between the undamped signal level and the damped signal level at least once in a third step;

detecting an oscillation if at least one deviation determined in the third step of the at least one oscillation detection step is higher than or equal to a predetermined oscillation threshold value; and

determining an undamped signal level of a signal on a signal path of the signal coupling device by repeatedly determining the signal level of the signal on the signal path and selecting the undamped signal level as a maximum signal level of the determined signal levels.

6. The method according to claim 1 , which further comprises providing the signal on the signal path as an uplink signal.

7. The method according to claim 1 , which further comprises providing the signal on the signal path as a downlink signal.

8. The method according to claim 1 , which further comprises providing the oscillation threshold value as a frequency-specific or frequency band-specific value.

9. A method for detecting oscillation in a signal coupling device, the method comprising the following steps:

carrying out at least one oscillation detection step including:

determining an undamped signal level of a signal on a signal path of the signal coupling device in a first step;

reducing a gain of the signal path in a second step;

determining a damped signal level of the signal on the signal path and a deviation between the undamped signal level and the damped signal level at least once in a third step;

detecting an oscillation if at least one deviation determined in the third step of the at least one oscillation detection step is higher than or equal to a predetermined oscillation threshold value; and

selecting the oscillation threshold value for detecting an oscillation of an uplink signal to be different than the oscillation threshold value for detecting an oscillation of a downlink signal.

10. The method according to claim 9 , wherein selection of the oscillation threshold values for detecting an oscillation of an uplink signal and for detecting an oscillation of a downlink signal are for uplink and downlink signals of an identical frequency band.

11. The method according to claim 1 , which further comprises reducing the gain of the signal path by at least one of reducing a gain of an amplifying device within the signal path or increasing a damping of a damping device within the signal path.

12. A device for detecting oscillation in a signal coupling device, the device comprising:

at least one device for determining a signal level on a signal path;

at least one device for reducing a gain of the signal path; and

at least one evaluation unit for executing an oscillation detection step including:

determining an undamped signal level of a signal on the signal path of the signal coupling device in a first step,

reducing a gain of the signal path in a second step,

determining a damped signal level of the signal on the signal path and a deviation between the undamped signal level and the damped signal level at least once in a third step,

detecting an oscillation if at least one deviation determined in the third step of the at least one oscillation detection step is higher than or equal to a predetermined oscillation threshold value; and

said at least one evaluation unit configured to start the oscillation detection upon an occurrence of at least one of:

a signal level of a signal on a signal path of the signal coupling device being higher than a predetermined starting threshold value, or

a time derivative of the signal level being higher than a predetermined signal edge threshold.

13. The device according to claim 12 , which further comprises at least one of at least one amplifying device for amplifying a signal on the signal path or at least one damping device for damping a signal on the signal path.

14. A signal coupling device for transmitting a signal between a terminal-sided signal interface of the device and an antenna-sided signal interface of the device, the signal coupling device comprising:

at least one signal path for connecting the terminal-sided signal interface to the antenna-sided signal interface; and

a device according to claim 12 for detecting oscillation.

15. The signal coupling device according to claim 14 , which further comprises at least one uplink signal path for connecting the terminal-sided signal interface of the device to the antenna-sided signal interface of the device, said uplink signal path including at least one amplifying device for amplifying an uplink signal, and said at least one device for determining a signal level on a signal path being at least one of disposed or configured to determine a signal level of an output signal of said at least one amplifying device.

16. The signal coupling device according to claim 14 , which further comprises at least one downlink signal path for connecting the antenna-sided signal interface of the device to the terminal-sided signal interface of the device, said downlink signal path including at least one amplifying device for amplifying a downlink signal, and said at least one device for determining a signal level on a signal path being at least one of disposed or configured to determine a signal level of an output signal of said at least one amplifying device.

17. The signal coupling device according to claim 14 , which further comprises at least one of at least one amplifying device for amplifying a signal on the signal path for connecting the terminal-sided signal interface to the antenna-sided signal interface or at least one damping device for damping a signal on the signal path for connecting the terminal-sided signal interface to the antenna-sided signal interface.

18. The signal coupling device according to claim 16 , which further comprises at least one of at least one amplifying device for amplifying a signal on the signal path for connecting the terminal-sided signal interface to the antenna-sided signal interface or at least one damping device for damping a signal on the signal path for connecting the terminal-sided signal interface to the antenna-sided signal interface.

19. The method according to claim 5 , which further comprises repeatedly determining the damped signal level and the deviation, and detecting an oscillation if all deviations determined in the third step of the at least one oscillation detection step are higher than or equal to the predetermined oscillation threshold value.

20. The method according to claim 5 , which further comprises repeatedly performing the oscillation detection step, and detecting an oscillation if at least one or all deviations determined in the third step of each of the oscillation detection steps is or are higher than the predetermined oscillation threshold value.